Air bag



. J. MERZ.

- AIR BAG.

APPLICATION FILED SEPT. 11, 1920.

. 414 090 Patented Apr. 25, 1922.

JACOB MERZ, OF CHICAGO, ILLINOIS, ASSIGNOR '10 PERPETUAL AIR BAG- COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

AIB BAG.

Application filed September 11, 1920. SerlalNo. 109,608. 7

To all whom it may concern.

Be it known that I, JACOB MERZ, a citizen of the United States, and residing at Chicago, Illinois, have invented the new and useful Improvement in -Air Bags, of which the following is a specification.

This invention relates to air bags such asv are used 1n repalring pneumatic tlres to sup port the tire during the vulcanizing process. This invention constitutesan improvement on the device described in my application Serial No. 269,708, filed, January 4, 1919.

Air bags of this character are inflated for use by means of compressed air, steam or the like. In either case water or other liquid may be carried into the bag b the inflating medium. When the bag is in ated with-air,

' water or oil which are sometimespresent in the piping system may be carried into the bag from the outside. When inflated with steam, a certain amount of condensation takes place and the water so formed collects inthe bag. Under any of these circum-,

stances the collection of such liquids in the bag is the cause of deterioration of the bag which in time will rot at such points at which the liquid collects.

One of the objects of this invention, therefore, is to provide an air bagwhich may be drained so as to prevent the collection of such liquids and consequent deterioration.

Further objects will appear from the deT tail description taken in connection with the accompanying drawing, in which: I Figure 1 is a sectional view showing an air bag embodying this invention;

' Figure 2 is a section on line 22 of Figure 1; a

Figure-3 is a partial sectional view showing the application of this invention to a modified form of air bag; and

Figure 4 is a section on line 44 ure. 3. A

Referring now to the accompanying drawing, 1 designates a support, which ma be in the form of an ironrod which is'pre erably sion or, groove 2 on the interior side thereof; The heads 3 and 4 are also equipped with shanks 5 and 6 each being bored lengthand 4, the bag of Fig-- such drainage will take wise thereof toprovide a duct 21 through which the inflatmg medium may be intro-' duced. The duct 21 communicates by means of a plurality of inclined ducts 20with the bottom of the annular groove 2.

The airbag proper may consist of one or more concentric tubes of elastic material such as rubber 9, whichmay be covered with a protective covering of canvas or similar fabric or knitted material lO. The ends of the bag are adapted to slip o er the conicalfaces of the heads 3 and 4 with a snug fit. A metal, cup shaped cap 11 having conical sides adapted to fitthe conical faces of the heads 3 and 4, and having an aperture Specification of Letters Patent. 'Patented Apr. 25, 1922.

through which the shanks 5 and 6 may pass,

is fitted over each of said heads 3 and 4 so as to confine the walls of the bag between the conical face of the head'on the inside and the .conical face of the cap 11 on the outside to clamp said bag firmly between said faces.

A nut 12 threaded to engage a correspondin}; thread on each of said shanks 5 and 6 may be screwed down upon the cap 11 so as to firmly clamp the bag.

In the embodiment-shown in Figures 3 is constructed of a layer of fabric 16 embedded between interior and exterior coverings of rubber orsimilar material 15..

In use, the inflating medium may be con- .veyed to the bag by means of suitable connections such as 7. The lower end of the bag maybe sealed by means of a cap screwed on the shank 6, or a connection slmllar to the connection 7 may be attached to the lower end and the inflating medium may be caused to circulate through the bag. In either case,

the bag being used referably in a vertical position, any-liquid introduced into the bag will collect 1n the space 2 from whlch 1t may be drained through the ducts 20 and 21. In case he bag is sealed at the lower end, such drainage may be accomplished by slmply opening the seal; In the case where the mflating medium circulates through the bag (place of Us own accord and may be assiste by setting up circulation in such a we that the liquids to be removed will be carried out with the circulating medium. a I

It is obvious that various changes may be made in the detailsof construction without departing from the spirit of this invention; it is, therefore, to be understood that this invention is not to be limited to the specific details shown and described.

Having thus described this invention, what is claimed is:

1. In a device of the character described, an inflatable bag, means for inflating said bag, and'an end cap adapted for draining said bag. Y a

2. In a device of the character described, an inflatable bag, means for inflating said bag adapted to permit circulationof the infiating medium, and means at one end thereof for draining the bag.

3. In a device of the character described, an inflatable bag, means for inflating said bag adapted to permit circulation of the inflating medium, and means at one end thereof for draining said bag.

4. In a device of the character described, an inflatable bag, means for inflating said flating medium, and means for draining said bag in the direction of circulation of said .v

medium.

5. In a device of the character described, an inflatable bag, means for inflating said bag, and means for draining said bag comprising a head, provided with collecting space for liquids, and a duct connecting said space with the exterior of the bag.

6. In a device of the character described, an inflatable bag, means for inflating said bag, and means for draining said bag comprising a clamping head, provided with an annular groove forming a collecting space for liquids, and a duct connecting said space with the exterior of the bag.

In testimony whereof I aflix my signature this 31st day of July, 1920.

JACOB MERZ. 

